feat: creating new mx_ suite of macros!

also adding new mx_getcode macro

tests/base/mf_getfmtname.test.sas

@@ -0,0 +1,33 @@
+/**
+  @file
+  @brief Testing mf_getfmtname macro
+
+  <h4> SAS Macros </h4>
+  @li mf_getfmtname.sas
+  @li mp_assert.sas
+
+**/
+
+%mp_assert(
+  iftrue=(
+    "%mf_getfmtname(8.)"="W"
+  ),
+  desc=Checking basic numeric,
+  outds=work.test_results
+)
+
+%mp_assert(
+  iftrue=(
+    "%mf_getfmtname($4.)"="$CHAR"
+  ),
+  desc=Checking basic char,
+  outds=work.test_results
+)
+
+%mp_assert(
+  iftrue=(
+    "%mf_getfmtname(comma14.10)"="COMMA"
+  ),
+  desc=Checking longer numeric,
+  outds=work.test_results
+)